How to Dispute a Bill Using the Good Faith Estimate
What is a good faith estimate?
A good faith estimate is a written projection of the expected charges for scheduled care. Uninsured and self-pay patients are entitled to one before scheduled care. It gives you something concrete to compare with the final bill, which is why it matters in a dispute.
Who can use the federal dispute process?
The patient-provider dispute resolution process is available to uninsured or self-pay patients under 42 U.S.C. § 300gg-136. If you have insurance, the more relevant tools are your EOB, your plan's appeal process, and the No Surprises Act protections that may apply to your claim.
How does the $400 comparison work?
The process applies when the final bill is $400 or more above the good faith estimate from that provider or facility. For illustration only, if your estimate listed $1,500 and the final bill is $1,950, the bill is $450 above the estimate. Compare the same provider's estimate with the same provider's bill, not totals from different providers.
What should you gather?
Organize your paperwork before you start so the submission is clear.
- The good faith estimate you received
- The final bill or itemized statement
- Any notes about changes in your care, if you were told about them
- Your correspondence with the provider about the difference
- Your contact details and account number
What should you do about timing?
The process has a short filing window, so do not wait. Check the CMS No Surprises page for the current deadline instead of relying on a number from memory, and write the date on your calendar as soon as you see the final bill.
Should you contact the provider first?
Yes. Ask the billing office to explain the difference between the estimate and the bill. Sometimes the answer is a clerical error that can be corrected, and sometimes it is a service that was added. Keep the explanation in writing, and ask whether they will adjust the bill.
Step-by-step
- Find your estimateLocate the good faith estimate from the provider or facility that billed you.
- Compare the totalsLine up the estimate against the final bill from the same provider or facility.
- Calculate the differenceSubtract the estimate from the bill and see whether it is $400 or more.
- Ask the provider to explainContact billing, request a written explanation, and ask whether they will correct the bill.
- Check the CMS siteRead the current process and filing window at cms.gov/nosurprises before you submit anything.
- Gather your documentsAssemble the estimate, bill, and correspondence so they are ready to send.
- Start the dispute processFollow the CMS instructions, and keep confirmation of what you submitted and when.
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Frequently asked questions
Do I automatically get a good faith estimate?
Uninsured and self-pay patients are entitled to one before scheduled care. If you did not receive an estimate, ask the provider or facility for one in writing before the service, and keep any response. If care has already happened, mention the missing estimate in your discussion with billing.
Does this process apply if I have insurance?
The process described here is for uninsured or self-pay patients. If you have insurance, compare the bill with your EOB, use your plan's appeal process if a claim was denied, and look at whether No Surprises Act protections apply to your situation.
What if my care changed after the estimate?
Ask the provider to explain in writing what changed and why it affects the price. Keep the explanation with your documents. Whether a change affects your options depends on the details, so check the CMS site and consider asking a healthcare attorney if the amount is large.
Is there a deadline to start the process?
Yes, the filing window is short. This page does not state a number because it can change, so check the CMS No Surprises page for the current deadline. Act as soon as you receive the final bill.
Sources and further reading
Related guides
Not legal or medical advice. Medical Bill Dispute Pro is a software tool that helps you prepare billing dispute letters. It is not a law firm, does not provide legal advice, and cannot guarantee any outcome. Laws and rules change and vary by plan and state; verify important details with the sources linked above, your insurer, or a qualified professional.